Yes, I felt similar sentiments too. A few years ago, one of my friends and old roommate from many years ago, suddenly passed away and cause unknown. He had just graduated over half a year ago and while he isn't doing well financially, he was living under his parents' roof. Everything seemed to be fine and normal and in fact, he isn't the type to CTB and is rather enthusiastic about life in general, played with a band, and generally doing alright (despite the financial setback) in life. All of a sudden, I got news from an acquaintance that he just passed away in early 2017. I am saddened by his passing because I know he wanted to live and experience life.
Anyways, with that said, back to the main point. Yes, I think as far as life is concerned, it is cruel both for people who want to live and people who want to die. For those who want to live, their lives are cut short by a tragedy, an accident, and/or unfortunate event (wrong place, wrong time), bad luck, etc. However, for people who want to CTB, life finds a way to cheat us out of the sweet release from this hellish existence.